Quiet is increasingly scarce in the modern world. But growing evidence shows that we need it for our health and cognition
In the 1970s, the pioneering environmental psychologist Arline Bronzaft found that the reading test scores of Manhattan middle schoolers whose classrooms faced a high-decibel elevated subway trackbehind those of students in quieter classrooms on the opposite side of the building. Since the stress response to noise is well established, it was clear that intermittent spikes in decibel levels—almost on par with a heavy metal concert—were inherently problematic.
While Kriste and her team hypothesized that pup sounds would yield the strongest results, they found that silence, in fact, elicited the strongest response from the mice, yielding the highest number of newly grown and sustained neurons. “Functional imaging studies indicate that trying to hear in silence activates the auditory cortex,” they wrote.
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